#!/bin/bash

a=10
b=20

val=`expr $a + $b`
echo "a+b: $val"

val=`expr $a - $b`
echo "a-b: $val"

val=`expr $a \* $b`
echo "a*b: $val"

val=`expr $b / $a`
echo "b/a: $val"

val=`expr $b % $a`
echo "b % a: $val"

if [ $a == $b ]
then
	echo "a is equal to b"
fi

if [ $a != $b ]
then
	echo "a is not equal b"
fi

